James allen crocker



(No Model.)

2 Sheets-Sheet 1.

J. A. (Ti-ROCKER.

FILTERING MACHINE.

Patented Feb. 22, 1887.

.INVENTEIR. I arr/@ 202 (No, Model.) 2 Sheety-Sheet 2.

J. A. CROOKER. FIL BRING MACHINE. No. 358,106. Patented Feb. 22, 1887.

MT NE '5 5 E35 Q V IN VENTUR.

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UNITED STATES PATENT Orrrcn.

JAMES ALLEN OROGKER, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE GROOKERFILTERING COMPANY.

FlLTERlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 358,106, dated February22, 1887.

Application filed April 16, 1886-.

To (ZZZ whom, it may concern.-

Be it known that I, JAMES ALLEN CROOKER, of Boston, in the county ofSuffolk and State of Massachusetts, have invented certain Im- 5provements in Filtering-Machines, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings, making part of this specification, in which- Figure l is aperspective View of the shell or casing of my improvedfiltering-machine. Fig. 2 is an end elevation representing the locationof the strainers within the openings of one of the heads of the casing.Fig. 3 is a sectional elevation, the upper portion of said figurerepresenting a longitudinal central sec tion, and its lower portion alongitudinal or side elevation of my filtering-machine mounted on itssupporting-frame. Fig. 4 is a plan representing a portion of the casingbroken away. Fig. 5 is a transverse section through the center of thefiltering-machine in the direction of the line 00 a: of Fig. 3, being atthe joint formed by the junction of two equal cylindrical sections. Fig.6 is a perspective'view of a roller, bearing for the center of thefiltering-machine. Fig. 7 represents the end of the casing mounted inits bearing and provided with acog-wheel, with which engages a wormgearfor revolving the same. Fig. 8 represents a portion of my improvedcorrugated strainer and its frame and supporting-braces enlarged. Fig. 9is a plan of the same. Fig. 10, a section on the line y y, enlarged.Fig. 11, enlarged section on the line a z of Fig. 2, showing the mannerof securing the head in the end of the casing. Fig. 12 is an elevationof the curved clampingplate secured at each end of the strainer toprevent any longitudinal movement thereof when adjusted in place.

My present invention has for its object to afford additional facilitiesfor the construction and manipulation of filtering machines of largesize for manufacturing purposes, and for the supply of cities, 8m,special reference being had herein to that class of filter described inPatent N 0. 305,574, granted me September 23, 1884:, in which a singleshell or casing containing the filtering material is employed so withoutany other outer or inclosing casing;

Serial No. 199,053. (No model.)

and one of the features of this invention consists in a single shell orcasing closed at all points of its exterior surface except at its ends,which are provided with openings located diametrically opposite eachother for the reception of the strainers, in order to enable them to bemore readily entered and removed, the casing being preferably ofcylindrical form of boiler-iron, thus insuring maximum lightness withthe necessary strength.

My invention also consists in certain longitudinal rails secured to theinside of the casing on each side of the strainer-frame to form dovetailways, upon which it may readily be slid into place within or removedfrom the casing, 6 5

My invention also consists in a pair of curved plates to be clamped tothe inner walls of the heads at opposite ends of each opening in thecasing, said plates preventing the longitudinal movement of the strainerafter being located therein.

To enable others skilled in the art to understand and use my invention,I will proceed to describe the manner in which I have carried it out. V

In the said drawings, A represents a cylindrical shell or casing, formedpreferably of plates of shcet-iron riveted together at a, the entirecylindrical surface being closed, but provided with a closed man-holefor the entrance and removal of the filtering material. Each end of thecylindrical casing is provided with a hollow head, B, the outer wall ofwhich has a horizontal flange, b, extending'around about two quarters ofits periphery, and it is by this horizontal flange that the head issecured to the corresponding or contiguous end portion of the casing bya series of rivets, 0, Figs. 1, 7, and 11.

The form of the hollow head is shown in Figs. 3 and4, and each head hastwo curved openings, d, extending through its inner and outer walls, 6f, and located immediately above and below and diametrically oppositeeach other, and between the inner end of each opening at and thecontiguous outer periphery of the hub C the exterior wall of the head Btapers outwardly from the lower portion of the upper opening (I downwardand outward from a vertical line, and from the upper portion of I00 thelower opening (2 upward and outward from a vertical, the twolongitudinal sides of each opening being formed by two concentric arcsof circles having the axis of the filter-casing as their center. Theremaining portion of the exterior wall of the head lies in a verticalplane extending between the inner end of the horizontal flange b and thehub 0.

Each inner portion of the head Bis correspondingly tapered inwardly fromits outside toward its hub, Fi 4, the space between the two walls orportions of the head at each end of the shell formingawater-passage ofgreatest width in the direction of a vertical plane passing through theaxis of the machine, said water-passage being of greatest length atitsouter endi. 6., in the direction of a plane at right angles to theaxis-whereby a passage of uniform size at any point in cross-section isformed, which insures the unobstructed flow of the water, as desired.The exterior wall of each tapering head is re-enforced by webs h, whichserve as braces, the inner ends of which terminate at the hub.

The two openings d in each head are forthe reception of the two curvedcorrugated strainers D D, Figs. 2, S, and 9, these end openings enablingthem to be conveniently and expeditiously located in position or removedfrom the casing, longitudinal rails 2', bolted to the inside of thecasing, Figs. 2 and 5, being provided and serving as dovetail ways forthe strainers to slide on. These rails or ways prevent any lateralmovement of the strainers after being adjusted in place, and theirlongitudinal mo vementis prevented by two circular clamping-plates, Z,bolted to the inner walls of two opposite heads, Fig. 12.

Each opening (I is closed by a covering-plate, E, secured thereover insuch manner as to insure a watertight joint, the outer edge of each headbeing secured by bolts m passing into the flange of a segmental strip,Z), riveted to the cylindrical exterior of the shell near its rim, bywhich construction the bolts may be loosened and the covers removed withgreater faeility than were the casing provided with openings in itscylindrical surface, as set forth in the Letters Patent No. 305, 574 tome, (herein referred to,) the cost of construction of thefiltering-machine forming the subject of my present invention beingthereby reduced.

For this class of filtering-machine I preferably employ a perforatedplate, D, of metal, Fig. 9, bent so as to form corrugations, therebysecuring a large area of straining surface.

H is a curved frame having a series of rectangular braces, a, extendinglongitudinally and cast integral therewith. The corrugated strainer isplaced upon these braces and its frame, and then confined to the latterby a band or strap, p, extending around its edges, Fig. 9, after which asecond series of braces, 1, each provided with cars 3, is bolted to thestrainerfra1ne, the two series of braces being located on opposite sidesof the strainers, and occupying alternate positions with each other andthe corrugations. \Vhen the strainer is within the casing,the outer endsof the second series of braces abut against the inner periphery of thecasing, the joint office of the two series of braces 11 1' being topreserve the original form of, keep in place, and prevent damage to, thestrainer.

Where the length of the cylindrical casing is considerable and theweight consequently great, I intend to divide it into two equal portionssnugly abutting each other at the center, the joint t at this pointbeing made secure and water-tight by a metal ring, I, located thereoverand fastened by two rows of bolts, a, one

on each side, passing through its two flanges.

and the cylindrical boiler-plate casing. (Sec Figs. 1, 3, and 5.)

As in this construction the weight of the filtering-machine with itscontents of water and filteringmaterial wouldjcopardize the strength ofthe joint t if its encircling-ring I was unsupported, I secure thereoveran annular covering band, K, formed in three sections, having flanges 12united by bolts, and provide bearings therefor composed of rolls L,mounted in a frame, M, fastened to the floor thereunder. (See Fig.6.)Vhere the casingis formed of two cylinders in this way, each curvedcorrugated strainer may be divided into two equal portions, one of whichis entered through one opening (I of one head B, and the other portionthrough the corresponding opening d of the head at the opposite end ofthe divided casing.

\Vhere the length of the strainer is not great, it may be in one pieceand be inserted and removed at one operation. One or both heads areprovided with cog-wheels N, with which engages worm'gear I, Figs. 3 and7, for rotating the filtering-machine when required to be reversed, orpinions may be employed, if desired.

In an application for patent made by me simultaneous herewith I havedescribed many parts of the mechanism herein described, as suchdescription was necessary to show the construction and in what mannerthe invention was carried out; but in said simultaneous application I donot claim the features herein claimed.

I claim- 1. A filtering-machine having but a single shell or casing,A,with its entire exterior surface closed at all points except at itsends or heads, each of which is provided with a pair of openings, d, incombination with a pair of strainers and a pair of covering-plates, E,substantially as described.

2. A single shell or casing of cylindrical form having a head providedwith a pair of openings closed by a pair of covering-plates, the inneredges of which are bolted to the head and their outer edges to stripsriveted to the ICO eyiind-rical rini of the casing, in combinationlateral movement, constructed to operate sub- With strainers entered atand removed from stantially as described. IO said openings, as setforth. I Witness my hand this 31st day of March,

3. In combination with the strainer-frame 1886. 5 and inner walls of theheads, a clamping-plate, JAMES ALLEN OROOKER. Z, secured to the latterto prevent the longi- In presence of tudinal movement of thestrainer-frame,and a N. W. STEARNS, pair of longitudinal 1-2ti1s, i, forpreventing its H. W. STEARNS.

